This man discovered butylene and showed that rainfall was caused by a change in temperature. In his New System of Chemical Philosophy, he stated a flawed "rule of greatest simplicity." This man names a result often used to calculate the pressure of a dry gas collected above water. He stated that elements combine in ratios of small whole numbers in his law of multiple proportions, and that atoms of different elements have 
This man discovered butylene and showed that rainfall was caused by a change in temperature. In his New System of Chemical Philosophy, he stated a flawed "rule of greatest simplicity." This man names a result often used to calculate the pressure of a dry gas collected above water. He stated that elements combine in ratios of small whole numbers in his law of multiple proportions, and that atoms of different elements have different atomic weights. This namesake of the atomic mass unit stated the law of partial pressures. For 10 points, name this English chemist who pioneered the atomic theory of matter.
This man discovered butylene and showed that rainfall was caused by a change in temperature.
John {Dalton}